Power Computing PowerBase Low-Profile, User Manual

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Connecting Peripheral Devices
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PowerCenter Pro User’s Guide
17
Setting the SCSI ID
Each device in a SCSI chain requires a unique number called a SCSI ID, which
the computer uses to identify the device. The computer itself is assigned SCSI
ID 7 and the internal hard disk is assigned SCSI ID 0. Every other device you
install must have a unique number from 1 to 6.
Drives provided by Power normally come with SCSI ID pre-set as follows; bus 1
is the high-speed 20 MB per second UltraSCSI bus and bus 0 is the 5 MB per
second bus.
The way you assign SCSI IDs varies from device to device. On most external
devices, the ID is displayed on the back of the device. You usually change it by
pressing small buttons above or below the number display. For some external
and most internal devices changing the ID requires setting switches or moving
jumpers.
Changing the ID requires turning your computer and any connected external
devices off. Refer to the documentation that came with the device for exact
instructions on how to set your device’s SCSI ID.
The important thing to remember is that each device must have an ID that is
unique within its bus. If there is an ID conflict, your computer and the SCSI
devices connected to it will malfunction.
Bus SCSI ID Device
1 0 primary internal hard drive (terminated)
1 1 optional additional internal hard drive
0 3 CD-ROM drive (terminated)
0 5 optional removable-cartridge drive
both 7 motherboard (self-terminated)
2 Conn Periph Page 17 Friday, June 6, 1997 9:41 AM